docs: def add_channel_info(self, attrs, clear=False):
          """ Add channel info data to the channel_id group.
  
          :param data: A dictionary of key/value pairs. Keys must be strings.
              Values can be strings or numeric values.
          :param clear: If set, any existing channel info data will be removed.
          """
          self.assert_writeable()
          if 'channel_id' not in self.handle:
              self.handle.create_group('channel_id')
          self._add_attributes('channel_id', attrs, clear)